Heating device



FIG. 1 is a perspective view of a heating device showing our new design;

FIG. 2 is a front elevational view showing the design for the heatingdevice of FIG. 1;

FIG. 3 is a rear elevational view showing the design for the heatingdevice of FIG. 1;

FIG. 4 is a left side elevational view showing the design for theheating device of FIG. 1;

FIG. 5 is a right side elevational view showing the design for theheating device of FIG. 1;

FIG. 6 is a top plan view showing the design for the heating device ofFIG. 1; and,

FIG. 7 is a bottom plan view showing the design for the heating deviceof FIG. 1.

The broken lines shown in the drawings illustrate portions of theheating device that form no part of the claimed design.

CLAIM The ornamental design for a heating device, as shown anddescribed.